Color

#101d42

#101d42
hex#101d42
rgbrgb(16, 29, 66)
hslhsl(224, 61%, 16%)
oklchoklch(0.243 0.072 266.5)
Closest name: Nightwalker (#161d3b)Relative luminance 0.0138

Colors that go with #101d42

Charcoal, Dark Olive Green and Sea Green lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#423410

#103642 · #1c1042

#42101d · #1d4210

Split-complementary

Open in tool →

#421c10 · #364210

#421036 · #423410 · #10421c

Contrast

#101d42 as textRatioAAAA largeAAAFix
Aaon white
16.45:1passpasspassPasses AAA — no fix needed.
Aaon black
1.28:1failfailfail
  • AA: use #4a6fd3 as the text (4.51:1)
  • AAA: use #7893de as the text (7.03:1)
  • AA: or shift the background to #878787 (4.58:1)
  • AAA: or shift the background to #ababab (7.16:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #101d42 as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

Palettes built around it

Fonts for this mood

#101d42 reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #101d42
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #101d42 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/101d42-9ca2c4-df724e-221f2d-e9eff1?lock=0&style=vibrant

Want the agent to remember your picks and write them into a living brand? Create a free BrandSweets workspace.

Machine-readable: color.md